Question

Help pleaseAn artist makes a design using rows of tiles. Each consecutive row has 2 times the number of tiles as the row before. The expression 12 x 2^n-1 represents the number of tiles in the n^th row of the design.which statement below is true?

Answer 1

SOLUTION

The expression for the number of tiles in a row is

$12\times2^{n-1}$

Hence

For the first row, n=1

$\begin{gathered} \text{for n=1, substitute into the answer tab, we have } \\ n=1 \\ 12\times2^{n-1} \\ 12\times2^{1-1} \\ 12\times2^0=12 \end{gathered}$

Hence

The first row has 12 tiles

Thus

Answer: The value 12 represent the number of tiles on the first row (Option A)